Improvemint in roofing



1. PARK.

Improvement ih Roofing.

, No. 133,247. Patented N ov.19,i872.

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JOHN PARK, OF J OLIET, ILLINOIS.

IMPROVEMENT IN RGOFlNGl Specification forming part of Letters Patent No.133,24?, dated November 19, 1872; antedated November 18, 1872.

To all whomit may concern:

Be it known that I, JOHN PARK, of J oliet, in the county of Will and inthe State of Illinois, have invented certain new and useful Improvementsin Roofing; and do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawing and to the letters of reference marked thereon making a part ofthis specification.

The nature of my invention consists in the construction of roofs forbuildings, as will be hereinfter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a vertical section, and Fig. 2 a side View, of my roof.

A represents a roof-frame, made strong in any suitable manner; and thisframe is sheeted over with tongued-and-grooved flooringboards B, drivenup and nailed down tight as a floor. A thick wash of alum and salt isthen made, in proportion of one pound of alum to ten of salt, with watersufficient to mix them. This wash is swept evenly all over the roof tosaturate the sheeting B, and while itis yet wet a layer, a, of dry saltis sifted over it so as to cover the sheeting all over white. The roofis then covered all over with felt roofingpaper b, saturated with alumand salt in the same proportions as above, more or less and when thepaper is dry it is coated all over with a mixture, 01, of resin andtallow. The resin and tallow, in the proportions of two to one, (more orless,) are melted together, and, while hot, brushed over the paper feltuntil every partis well covered over. Another layer, a, of salt is thensprinkled over the same, as before. Then another layer, 7), of feltroofingpaper, saturated with salt, is put on so as to break joints overthe first sheet of paper. This second layer of felt paper is thencovered with another coating, cl, of resin and tallow, and still anotherlayer, a, of salt. Around the edges of the roof is nailed or otherwisefirmly secured a heavy sheet or cast iron curbing, G, to inolose thebrick tiles D D. These tiles are to be made about one inch and an eighththick, or thereabout, and six inches broad by ten inches long, and theyare to be laid all over the top of the roof to prevent fire fromcatching that might be carried from any burning building, the bricktiles to be laid with close joints in thin lime and sand mortar. Afterthe tiles are laid I take a brick and rub all over the roof to smooth itoff.

This roof, when laid as above described, will be perfectly water andfire proof, the resin and tallow preventing the water from leakingthrough the paper felt,and also keeping the paper from decaying orrotting and it cannot ignite below the brick for want of air. The tongued-andgrooved sheeting B being airtight and saturated with salt andalum, (nonconductors of heat,) it cannot ignite, in case of a hot fireabove, for want of air below; and the salt always retaining moisture, itwill prevent the sheeting from swelling or shrinking.

In the side of my roof are holes 6 e to vent olf stagnated and heatedair; and in case of a building taking fire in the inside water can bethrown in through these holes. They may be open ed or closed atpleasure.

Having thus fully described my inventionwhat I claim as new, and desireto secure by Letters Patent, is-

1. The air-tight tongued-and-grooved sheeting B, saturated with salt andalum, substantially as herein set'forth.

2. The felt roofing-paperb, saturated with alum and salt and laid upon alayer, a, of salt; then its upper side covered with a mixture, d, ofresin and tallow, and a layer, a, of salt sprinkled on top of the same,substantially as here, in set forth.

3. The within-described roof, consisting of the air-tight sheeting B,saturated with salt and alum, and a layer, a, of salt sprinkled on' topthen one or more courses of felt paper, b,

saturated with salt and alum, a composition, 01, of resin and tallow,and a layer, a, of salt, and on top of alla layer of brick tiles, D D,

inclosed within a curbing, 0, all substantially as and for the purposesherein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this13th day of March, 1872.

JOHN PARK. Witnesses:

MARTIN WESTPHAL, NEWTON PARK.

